Archive a test plan
The only way to archive a test run is to archive the associated test plan. When you archive a test plan, the associated test runs no longer appear in the associated test case, and the test case status reverts to "not scheduled."
Select the Test Plans tab in the left panel.
Right-click on the test plan that you want to archive and select Archive.
To make a test plan and its associated test runs active again, right-click on the test plan and select Unarchive.
This action recalculates the test case status.